166272397238 has 48 divisors (see below), whose sum is σ = 270596252304. Its totient is φ = 76559463360.

The previous prime is 166272397223. The next prime is 166272397241. The reversal of 166272397238 is 832793272661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36889781 + ... + 36894287.

It is an arithmetic number, because the mean of its divisors is an integer number (5637421923).

Almost surely, 2^166272397238 is an apocalyptic number.

166272397238 is a deficient number, since it is larger than the sum of its proper divisors (104323855066).

166272397238 is a wasteful number, since it uses less digits than its factorization.

166272397238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965 (or 5946 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 56.

The spelling of 166272397238 in words is "one hundred sixty-six billion, two hundred seventy-two million, three hundred ninety-seven thousand, two hundred thirty-eight".